Technical data for 7MnB8 cold-drawn steel wire, compliant with EN 10263-2. View the chemical composition, mechanical properties, and related technical requirements for this grade.
Only data directly related to this material is shown here. Inspection, equipment, process and packaging information is linked separately.
1. Combinations of delivery conditions
Table 1 – Summary of delivery conditions, product forms, and conformity requirements
Delivery condition
Symbol
Product form A
Applicable requirements
Rolled wire
Bar
Wire
hot-rolled
+U
X
X
-
Chemical composition according to Tables 2 and 3
Mechanical properties according to Table 4
Additional or special requirements according to EN 10263-1 Annex A b
Rolled peeled
+U+PE
X
X
-
cold-drawn
+U+C
-
X
X
Cold-drawn + annealed to produce spheroidal carbides
+U+C+AC
-
X
X
Cold-drawn + annealed to produce spheroidal carbides + subsequently cold-drawn again
+U+C+AC+LC
-
X
X
Annealed to produce spheroidal carbides or annealed to produce spheroidal carbides + roll-turned
+AC or +AC+PE
X
X
-
Annealed to produce spheroidal carbides + cold-drawn
+AC+C
-
X
X
Other delivery conditions may be agreed upon at the time of order.
a X =applicable – =not applicable b If agreed upon during inquiry and ordering
2. Chemical composition
Table 2 – Chemical composition, cast analysis, mass fraction (% a)
Steel grades
C
Si
Mn
P max.
S max
Al b
Abbreviated name
Workpiece material number
7MnB8 e,f
1.5519
0.06 to 0.09
0.15 to 0.25
1.85 to 1.95
0,015
0,025
0.02 to 0.04
Table 3 – Permissible limit deviations for product analysis relative to the cast analysis limits in Table 2
Element
Limit values according to melt analysis, mass fraction in %
Limits for product analysis, mass fraction in %a
C
≤0.22
±0,02
Si
≤1,00
+0,03
>1,00
±0,05
Mn
≤1,00
±0,04
>1,00 ≤1,80
±0,05
P
≤0,025
+0,005
S
≤0.025
+0,005
Al
≤0.060
±0,005
±means that, for a given heat, either the upper or the lower limit of the range specified in Table 2 for melt analysis may be exceeded, but not both simultaneously.
3. Mechanical properties
Table 4 – Mechanical properties of wire rod, bars, and wire not intended for heat treatment after cold working
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TECHNICAL NOTE
Application and ordering note
Chemical composition, mechanical properties, tolerances and delivery condition must be confirmed against the applicable standard edition, customer drawing and order specification.
